Table 1.

Reactions and rate constants relevant to the generation and combination of dG(-H)^• and ^•CH₃ radicals^a

N		kn (M−1 s−1)
1	S2O82- + hν → 2 SO4•–	φ308 = 0.55 (ref. 32)
2	SO4•– + SO4•– → S2O82-	(1.1±0.1)×109 (ref. 33)
3	SO4•– + dG → SO42– + dG(-H)• + H+	(4.1±0.3)×109b
4	SO4•– + DMSO ⇆ [SO4•–... DMSO]	1×1010b,c
		(2.1±0.2)×107b,d
5	[SO4•–... DMSO] + H2O → SO42– + •CH3 + H3CSO2H + H+	(4.2±0.4)×106b,e
6	dG + [SO4•–... DMSO] → dG(-H)• + SO42– + DMSO	(3.8±0.4)×109b
7	dG(-H)• + •CH3 → Me-dG	(4.7±0.8)×108b
8	•CH3 + •CH3 → C2H6	(1.6±0.2)×109 (ref. 34)
9	dG(-H)• + dG(-H)• → products	(1.0±0.1)×108b

^a25 mM deoxygenated phosphate buffer solution, pH 7.4.

^bobtained in this work.

^cthe rate constant for complex formation, k₄.

^dThe rate constant for complex dissociation, k₋₄ is in units of s⁻¹.

^erate constant for ^•CH₃ radical formation, k₅ (in units of s⁻¹).